A call control method and core network equipment

Abstract

The embodiment of the invention discloses a call control method and a core network device which are used for preventing malicious users from repeatedly performing attack by means of loopholes. The call control method of the embodiment comprises the following steps that: a core network device receives an SIP call request sent by a first network element, wherein the SIP call request contains the identifier of the first network element and the identifier of a second network element; the core network device transmits a session to the first network element according to the identifier of the first network element so as to perform message session progress, and transmits an initial address request message (IAM) or an invitation message (INVITE) to the second network element according to the identifier of the second network element; and the core network device monitors whether the first network element interrupts a call, if the first network element interrupts the call, the core network device judges whether the first network element satisfies a preset prohibition condition, if the first network element satisfies the preset prohibition condition, the core network device refuses the first network element to initiate an SIP call request again in a preset time period. The embodiment of the invention also provides a core network device.

Description

technical field [0001] The present invention relates to the communication field, in particular to a call control method and core network equipment. Background technique [0002] With the continuous development of data services, the LTE-based voice service VoLTE has been more and more widely used. In VoLTE communication, signaling messages are carried by the SIP protocol. [0003] During a call, the calling mobile phone interrupts the call after receiving the SIP Session Progress signaling message. At this time, the called mobile phone is in the waiting state until it times out. State 5-8 times. The calling mobile phone can keep the called mobile phone in a state of high energy consumption by repeatedly performing the following two steps: [0004] Dial up (that is, send INVITE signaling to the Volte server); [0005] Wait for the returned Session Progress signaling, and hang up after receiving the signaling. [0006] This vulnerability is easily exploited by malicious use...

AI Technical Summary

Problems solved by technology

[0008] However, the defense methods in the prior art need to be aimed at calls initiated by all SIP users, and the malicious users who really initiate such attacks only account for a very small proportion of all SIP users, so the defense methods in the prior art will absolutely Most of the normal SIP calls are affected, which increases the delay of the SIP call process and affects the user experience

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